Introducing the key management mechanism of secure multicast under the cluster framework of two-level management pattern,an EBS-based multicast key management protocol is put forward to assist the transmission of group communication messages by virtue of karnaugh map.

Also we proposed a new database encrypt mechanism using user s password to protect the private key,and suggested some design proposal of encrypt dictionary.

Setup and fulfillment of live line maintenance management mechanism;

Studies on integrated management mechanism of marine environment in Jinmen-Xiamen sea area;

Establishment of nursing risk management mechanism in order to ensure the safty of nursing;

Comparative study of management system of four professional soccer clubs in China and abroad;

Establishing a scientific and high-effect management system to maximize the talents resource effect

Comparatively Analyzing the Different Management System of Institutional Ethical Review Board between USA and China.